Originally Posted by jrowles91
Pushing a motor to high RPM's what am I risking? Say I run 4s on a motor that's recommended only to 3s. Please explain??
The 2 main issues are the mechanical properties of the materials used to manufacture it, the higher the rpm the greater the stress on materials, however, motors are manufactured to higher tolerances than the companies claim, to make them more reliable, so, you can assume with little confidence
say 25% over the high rpm mark of a motor, before you reach the inherent physical limitations of the motor. And by little confidence, i mean VERY LITTLE.
The other is heat, high revs equals more friction equals more heat. So if you are going to over rev the motor, heat sinks and fans are a must. Again, this is dependent on how long you are running for, short speed run, heat is not such an issue, so ramp it up, but for a 10m main, heat is going to be a huge issue.
If you are unsure about what you are doing, use HobbyKing motors and see how far you can go before they self destruct, 30 buck motor being destroyed is much nicer than 180 buck tekin.